Perixx PERIMICE-517, Wired Ergonomic Trackabll Mouse - 34mm Trackball - 7 Button Design - 1000/1600/2000 Resolution - Silent Click - 1.8m

Wired ergonomic trackabll mouse with 7 buttons 34 mm trackball, recommended for RSI user, industrial use. The trackball can be easily removed and cleaned by taping the trackball from the bottom hole of the mouse, using the blunt side of a pencil/pen. Use two dpi switch buttons to adjust sensitivity of the trackball between 1000, 1600 and 2000 dpi . Build in Silent Click function 1.8 m cable System requirement • Windows XP, Vista, 7, 8, 10 or later • USB Port Specification • Dimension: 130x107x45 mm • Approximate Weight: 120 g • Sensor: Laser • Trackball Size: 34 mm • DPI: 1000/1600/2000 dpi • Silent Click: Yes • Cable length: 1.8 m • Number of Buttons: 7 • Scroll wheel with middle click: Yes.